LanguageSelection: Restart UI when language is changed

But show a popup to ensure if you really want this, which also protect
tasks and recordings. This to ensure everything is correctly translated.
E.g. the lists in configs were not translated

lib/python/Screens/LanguageSelection.py

@@ -8,6 +8,8 @@
 from Components.Pixmap import Pixmap
 from Screens.InfoBar import InfoBar
 from Screens.Rc import Rc
+from Screens.MessageBox import MessageBox
+from Screens.Standby import TryQuitMainloop
 from Tools.Directories import resolveFilename, SCOPE_CURRENT_SKIN, SCOPE_LANGUAGE
 from Tools.LoadPixmap import LoadPixmap
 import enigma
@@ -49,10 +51,13 @@ def selectActiveLanguage(self):
 	def save(self):
 		self.commit(self.run())
 		if InfoBar.instance and self.oldActiveLanguage != config.osd.language.value:
-			self.close(True)
+			self.session.openWithCallback(self.restartGUI, MessageBox,_("GUI needs a restart to apply a new language\nDo you want to restart the GUI now?"), MessageBox.TYPE_YESNO, title=_("Restart GUI now?"))
 		else:
 			self.close()
 
+	def restartGUI(self, answer):
+		answer and self.session.open(TryQuitMainloop, 3)
+
 	def cancel(self):
 		language.activateLanguage(self.oldActiveLanguage)
 		self.close()